<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>注册页面</h1>
<form action="">
    <input type="text" name="username" @blur="blurfn()" placeholder="请输入用户名">
    <span>{{info}}</span><br>
    <input type="text" name="password" placeholder="请输入密码">
    <input type="button" value="注册">
</form>
<!--引入axios框架-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<!--引入vue框架-->
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<script>
    let v=new Vue({
        el:"form",
        data:{
          info:"测试"
        },
        methods:{
            blurfn:function () {

            }
        }
    })
</script>
</body>
</html>